Refrigerator car



March 23, 943

R. K. SCHWEBS REFRIGERATOR CAR Filed March 24, "1941 4 sheetssheet 1Inval-rtm1 ROBERT KEN T SCHWEBS March 23, 1943. R. K. scHwEBsREFRIGERATOR CAR 4 sheets-sheet 2 Filed March 24, 1941 Ilm /l/ l/ l/InVE lTtmr' ROBERT KENT SCHWEBS March 23, 943. R, K, SQHWEBS 293463REFRIGERATOR CAR Filed March 24, 1941 4 Sheets-Sheet 3 figg@ fm.

lfm/Eutin? ROBERT KENT SCHWES R. K. SCI-WEBS REFRIGERATOR CAR FiledMarch 24,

March 23, i943.

InVEntm ROBERT KENT SCHWEBS Pitt :1P HEHE Patented Mar. 23, 1943 UNITEDSTATES PATENT OFFICE.

aEFaIGEnA'roa can Robert Kent seliwebs, Hortonviue, wis. p AAppia-ammMaren 24, 1941, serial No. 384,881

(o1. sz- 24) 18 Claims.

'I'his invention appertains to refrigerator freight cars and is animprovement over my prior Patents Nos. 2,136,894, 2,159,406, and2,203,108, issued to me. respectively, on November 15, 1938, May 23,1939, and June 4, 1940.

One of the primary objects of my present invention is the provision of apump for delivering oil or like iluid under pressure to a turbine foroperating air circulating fans disposed above the transverse partitionsfor the bunkers, with an oil tank or sump arranged below the turbine andabove the pump for freely receiving the spent oil from the turbine andfor maintaining a constant head of liquid on the pump.

Another salient object of my provide means for arranging the oil returntank or sump directly in the transverse partition for the bunkers.whereby the oil will be maintained substantially at a constant,temperature and substantially unalected by outside conditions, so thatthe viscosity thereof will not materially change under diiferentclimatic conditions, and thereby permit an even ilow of oil through thesystem at all times.

Another important object of the invention is the use of an automaticreversing pump for the oil, whereby, irrespective of the direction ofrotation of the pump from the car wheels, the oil will ilow ln onedirection to the turbine without the use ofa complicated valve system.

A further object of the invention is the provision of means for drivingthe pump in such a manner from the car wheels that such means can belifted out of driving engagement with the car wheelsvto allow theconvenient operation of the pump from an extraneous source of power whenthe ar 1S Standing still, so as to facilitate the precooling of the car.

A further salient object of the' invention is to provide means foroperating a drive pulley belt for the pump directly fromA the peripheryof one of the car wheels, with a cone pulley connected to the pump shaftover which the belt travels, means being provided for shifting the conepulley in accordance with the speed of the freight car to bring aboutthe delivery of a constant flow of oil from the pump to the turbine.

A further important object of my invention is to provide a iiexibledrive shaft connection'between a wheel driven from the freight oar andthe pump, whereby to effectively reduce end thrust and the like on thepump shaft bearings.

A still further object of my invention is the provision of sliding gatesfor controlling the openings above the transverse partition of thebunkers on each side of the air circulating fans, with invention is to'means for automaticallyoperating the gates in accordance with the rateof flow of the oil to the return tank or sump. l A

A still further object of my invention is'to provide means forpermitting the shifting of the transverse partitions from their normalpositions to form the ice bunkers to a position against the end Walls ofthe freight car when the bunkers are not needed and when it is desiredto ll the entire car with freight.

With these and other objects in view, the invention consists in thenovel construction, ar'

rangement, and formation of parts, as will be hereinafter morespecically described, claimed, and illustrated in the accompanyingdrawings, in which drawings:

Figure 1 is a fragmentary, longitudinaL'sec-y tional view through arefrigerator freight car having my novel appliance incorporatedtherewith, and. showing one form of drive between the reversible pumpand one of the car wheels.

Figure 2 is a fragmentary, transverse, sectional view through thefreight car, taken on the line 2-2 of Figure 1, looking in the directionof the Figure 5 is a horizontal, sectional view taken on the line 5 5 ofFigure 4, looking in the direction of the arrows.

Figure 6 is a fragmentary, detail, sectional view illustrating a stillfurther form of operating the reversible pump from one of the carwheels.

Figure 7 is a fragmentary, detail, horizontal, sectional view taken onthe line 'I-l of Figure 6, looking in the direction of the arrows.

Figure 8 is a detail, fragmentary, transverse, sectional view taken onthe line 8-8 of Figure 6, looking in the direction of the arrows.

Figure 9 is a fragmentary, longitudinal, sectional view illustrating astill further modified form of drive for the pump.

Figure 10 is a fragmentary, longitudinal, sectional view taken throughthe body of the freight car on the line Ill-l 0 of Figure 12, looking inthe direction of the arrows, illustrating the means employed forcontrolling the sliding gates in accordance with the rate of flow of theoil to the return tank or sump.

Figure 11 is a view similar to Figure 10, the

view being taken on the line ||I| of Figure 12, looking in the directionof the arrows.

Figure 12 is a fragmentary, transverse, sectional view through the bodyof a freight car, illustrating the means employed for automaticallyoperating the gates.

Figure 13 is a fragmentary, transverse, sectional view through the bodyof a freight car, taken on a. smaller scale than Figures to 12,inclusive, and showing the use of a multiplicity of air circulating fansabove the transverse partition.

Figure 14 is a View similar to Figure 13, but showing the use of an aircirculating fan arranged on each side of the longitudinal center of thefreight car.

Figure 15 is an enlarged, fragmentary, longitudinal, sectional Viewthrough the body of a freight car, illustrating one means for permittingthe shifting of the transverse partition from its normal position to aposition against one end wall of the car.

Figure 16 is a fragmentary, transverse, sectional view through the bodyof a freight car, taken on the same scale as Figures 13 and 14, andshowing the use of several air circulating fans, with a bypass 'for thefluid leading to the return oil tank or sump.

Referring to the drawings in detail, wherein similar referencecharacters designate corresponding parts throughout the several views,the letter F generally indicates a refrigerator freight car, and thesame embodies the customary insulated body having formed at each endthereof, by transverse partitions 2|, bunkers 22 for the reception ofice in the summertime or a heater in the wintertime. The ice or theheater, as the case may be, rests on a grating 23 arranged above thelevel of the car floor. The body of the car is, likewise, provided witha suitable perforated false bottom 24 on which the foodstuffs to beshipped are placed.

In accordance with my invention, I arrange above the partition 2| one ormore air circulating fans 25. The fans`are adapted to draw air throughthe bunker and circulate the same over and down through the foodstuffsin the car. It is to be understood that one or more fans are provided ateach end of the car, and the operation of the fans is such as to drawair from under the false bottom 24, through the bunker, and over the topof the foodstuffs. The air may be circulated in an opposite direction ifso desired, that is, the air may be drawn from the top of the car andcirculated down through the bunkers, and under the false bottom 24. Inthe Figures 1 and 2, I have shown three air circulating fans at each endof the car.

The transverse partitions 2| can be formed in any desired manner, but,as shown, the partitions include equidistantiy spaced uprights 26extending from the top to the bottom of the car, and the spaces betweenthe uprights are closed by inner and outer panels 21. These panelsterminate short of the top of the car to provide air circulating spaces,and the air circulating fan.: are arranged within certain of thesedesired spaces above the panels. In Figures 1 and 2, a fan 25 is shownat the center of the car, and a fan 25 on each side of the car, and thespaces between the fans can be 'left open or closed, as may bepreferred. Each fan 25 and 25' is adapteo to be driven by a turbine 28.If preferred, means can be provided for adjusting the position of thefan and the turbine, and, if so desired,

the same can be mounted within a suitable hood 29.

Each turbine 28 can include a rotor 30 having blades or buckets 3|, andthis rotor can be mounted in a housing 32, which opens into the upperend of the liquid return tank or sump 33. There can be, if so desired, areturn tank or sump for each turbine, and it is to be notedl that thesereturn tanks or sumps are arranged within the transverse partition 2|.The tanks or sumps are hidden from view by the inner and outer panels 21and the uprights 26. Hence, the tanks are also protected against blows.I lay particular stress upon the arrangement of the return tanks orsumps in the partitions, and the purpose of this arrangement will bemore fully set forth.

Also, in accordance with my present invention, I provide novel means forsupplying fluid under pressure to the turbines from an automaticreversible rotary pump 34. 'I'his automatic reversing pump is preferablyof the type manufactured by the Tuthill Pump Company, of Chicago,Illinois, and this pump is of a well-known character and will not bedescribed in detail, but it is to be noted that the same includes astator casing 35 having an oil inlet 36 and an oil outlet 31. The pumpshaft 38 extends outward from one end of the stator casing, and the pumpshaft has connected directly therewith through the medium of a flexiblecoupling 39 (of the Lovejoy type) a drive shaft 40. The pump and theshafts are suspended by means of hangers 4| from a slide head 42, for apurpose which will be later set forth. At the present time, it is to benoted that the slide head 42 is mounted for'free sliding movement in aguidetrack 43 rigidly secured to the lower surface of the body of thefreight car.

The shaft 40 has keyed or otherwise secured thereto between certain ofthe hangers 4| a coneshaped drive pulley 44. 'I'he cone 'pulley 44 isdriven from a pulley belt 45, and this belt is, in turn, driven from oneof the car wheels 46 of the freight car. The bel-t 45 is also trainedover an idler pulley wheel 41 carried by a depending supporting bar 48.'I'he pulley wheels 44 and 41 are arranged on opposite sides of the carwheel 46, and one run of the belt 45 engages the tread of the car wheel.

'I'he belt is normally held down against the tread of the car wheel by aspring 49. This spring can be housed within a cylinder 50, and thesupporting rod 48 can have secured thereto a piston 5| for movement inthe cylinder. The spring 49 engages one end of the cylinder and pushesdown against the piston. Means can be provided for raising the pulleybelt above the car Wheel 46 and out of driving contact therewith. 'I'hismeans can consist of a,rack 52 formed on one edge of the bar 43, and` asector lever 53 can be employed for engaging the rack toA raise the bar.The lever can be mounted in any preferred manner from the car, such asby a bracket 54.

While I have shown the belt operated from the tread of the car wheel, itis to be understood that the same can be operated from any other movingpart of the car truck.

When a car is standing still, it is highly desirable in some instancesto pre-cool the car or the load contained therein, and, hence, byraising the pulley belt above the car wheel, the drive shaft 40 can beconveniently operated from some external source of power, such as asmall internal combustion engine. To permit the connection of the shaft40 with the power shaft of the engine, the shaft 40 can have keyed orotherwise secured thereto a drive pulley wheel 55.

Extending across the bottom of the freight car is a return oil headerpipe 53, and this pipe has communicating therewith branch pipes 51,which lead to the bottoms of the oil return tanks or sumps 33. 'I'hereturn header pipe 56 1s, in turn, connected with the inlet 36 of thepump through the use of a flexible hose 53. The bottoms of the oilreturn tanks 33 can have arranged therein relatively large screens 53 tofilter the oil prior to the return thereof to the pump. A feed headerpipe 60 is arranged adjacent the turbines 23, and this feed header pipe30 has communicating therewith nozzles 6I, which extend into the casings3l of the turbines. The feed header pipe 63 can be connected with theoil outlet 31 of the pump 35 by a exible hose 62.

Referring to Figure 2, it can be seen that the nozzles 6| are soarranged that the oil under pressure will impinge against the blades ofthe rotors, and the spent oil will enter directly into the return tanksor sumps 33 from 'the turbine casings. Hence, there is no back pressureon the feed oil line, and as the sumps are arranged below the turbines,the separation of air from the oil in the tanks is facilitated, and the'tanks and the casings for the turbines can be provided with air escapeand inlet openings 33 and 63'. By this arrangement, a full head of oilon the pump is insured at all times. In order to prevent foaming of theoil and to assure the escape of air therefrom, oppositely inclinedbaille plates 33' can be arranged in top of the sumps33 below theturbine outlets.

As heretofore stated, only one end of the freight car is shown, and thereturn hose 58 and the feed hose 62 extend to both ends of the car. Thefeed hose 62 on opposite sides of the pump can carry hand-operatedcontrol valves 64, so that the iiow of oil to either or both ends of thecar can be cut oli'.

I lay great stress on the arrangement of the oil return tanks or sumps33 in the transverse partitions 21, as by this arrangement of parts, theoil is maintained substantially at an even temperature at all times,unaffected by outside climatic conditions. Thus, the consistency of theoil will remain substantially constant at all times.

From the description so far it can be seen that I have utilized anautomatic reversible pump in my air circulating system, with novel meansfor operating the pump from a belt, which is maintained in drivingcontact with one of the car wheels.

As the pump is driven from a car wheel, it will be seen that the pumpwill be driven at different speeds according 'to the speed of travel ofthe freight car. Generally, it is advisable to drive the pump at aconstant speed, irrespective of the speed of travel of the car, and Iprefer to provide means for insuring the constant speed of rotation ofthe pump, irrespective of the speed of travel of the car. This can beaccomplished by the use of a governor or some other suitable mechanism.

In Figures 1, 2, and 3, I have shown one form of means for accomplishingthis purpose. The stator casing 35 of the pump 34 can have rigidlyconnected thereto a piston rod 65 leading into a cylinder 66. This rod65 is connected to a piston 61 operating in the cylinder, and one end ofthe cylinder has communicating therewith a feed hose 63 leading from themain feed hose 32.

Hence, the piston is affected by the oil pressure in the feed oil line.

If the speed of operation of the pump increases, there will be a greaterpressure in the line 32 and a greater oil pressure against the piston61, and-this oil pressure will tend to shift the pump, the shafts 33 and40, and the cone pulley 44 to the right (see Figure 2). This ispermitted in view of the fact that the slide bar 42 is mounted in theguideway 43 for movement. vThe shifting of the pump 35 and the conepulley 44 will allow the pulley belt to ride up on the large side of thecone pulley 44, and this will decrease the speed of the pump. When theoil pressure decreases, the pulley and the pump will be shifted back bya spring 69. A hand valve 1I can be arranged in the hose 63 for thecylinder 63 to shut off the flow of oil to the cylinder. when such maybe desired.

As is also shown in Figures 1 and 2, by-pass hoses 12 can connect thefeed hose line' 62 with the return hose line 53 on each side of thereturn pump inlet 33. Relief valves 13 are provided for controlling theow of iluid through the by-pass hose 12, and, hence, when the preisurein the feed hose 62 exceeds a certain degree, the valve 13 will functionto allow the liquid to by-pass from the feed hose 62 to thereturn hose53.

In order to prevent the shifting of the pulley belt 45 during vthemovement of the cone pulley 44, guide rollers 14 are arranged on eachside of the belt adjacent said cone pulley. These guide rollers can becarried by depending rods 15, and these rods are secured to the bottomof the car. y

By using the reversible pump 34, I eliminate complicated check valves inthe system and difficulties contingent with the use thereof, such asfreezing, sticking, and the like.

With the use of my enlarged oil sumps or tanks above the pumps, thecomplete separation of air from the oil is assured, and, thus, a steadystream of fluid will be delivered to the pump. Where air is mixed withthe oil, there is danger of ice froming around the orifices in thenozzles 6l for the turbines, Which, in time, would affect the working ofthe entire system.

When heating devices are used in the bunkers, the oil from the pump canbe shut off from one end of the car, and the turbines with the fans willgive the necessary circulation for heating.

If preferred, a pump can be provided for each end of the car, and wherethis arrangement is used, the drive for a pump at one end of the car canbe lifted lout of driving engagement with the car Wheel when it isdesired to circulate air from one end only.

Various arrangements other than that shown in Figures 1, 2, and 3 foroperating the pump can be employed, and in Figures 4 and 5, I have showna swinging U-shaped hanger 16 rockably mounted in bearings 'i1 suspendedfrom the car. The swinging bracket can have directly connected theretothe pump 13, and the pump shaft 13 is connected through a flexiblecoupling 30 with the drive shaft 3|. This drive shaft 8l has keyed orotherwise secured thereto a drive wheel 32, which normally engages theperiphery of a car wheel 83. The bracket 16 is normally urged downtoward the car wheel by springs 34, so as to insure the proper drivingcontact of the drive wheel 32 with the oar wheel 83.

By lifting the swinging bracket 16 against the tension of its springs34, the wheel 82 can be held above the car wlieel, and, thus, the wheel02 can be driven from some suitable external source of power. Thebracket can be held in a raised position by moving a link 84 suspendedfrom the bottom of the car over the bill of a hook 88 formed on thebracket. 4

In Figures 6, 7, and 8, I have shown another form of means for driving apump. In this form, a pump 81 is rigidly secured to the bottom of thefreight car, and its shaft is connected through the medium of a flexiblecoupling 88 with a flexible drive shaft 39. This drive shaft I9 isoperatively connected to a friction wheel 80, which is adapted to benormally held in contact with a car wheel. The friction wheel 30 iscarried by one end of a. swinging bracket or platform 9|, and thisbracket or platform is rockably carried by a bearing 92 suspended fromthe bottom of the car. Spring means 93 is utilized for engaging thebracket or platform to hold the friction wheel 90 in contact with theperiphery of the car wheel. This platform can also be held in a raisedposition by some suitable means. such as the means shown in Figures 4and 5, when it is desired to drive the pump from an external source ofpower.

I lay great stress on the use ,of the exible drive shaft 89, as byutilizing a flexible shaft, the pump can be readily suspended from thebottom of the freight car, and all shocks thereto will be eliminated.The coupling 88 eliminates all end thrust on the pump shaft bearings.Where necessary or desirable, cushion means 95 can be interposed betweenthe pump and the freight car.

In Figure 9, I have shown a form of drive for the pump similar to thatshown in Figures l., 2, and 3, but in the form shown in Figure 9, nomeans is provided for changing the speed of the drive from the car wheelto the pump. In this flgure, a. pump 96 is suspended directly from thebottom of the car, and a driven pulley 91 is operatively connected tothe pump shaft. This pulley wheel 81 has trained thereabout a drive`belt 98, and this belt is also trained over an idle pulley wheel 99carried by a swinging bracket |00. The bracket is rockably mounted inbearings |0| carried by the bottom of the car, and the bracket isnormally urged downward by coil springs |02. Hence, the pulley belt isnormally held in driving contact with the periphery of a car wheel |03.

'I'he bracket |00 can be raised against the tension of the spring |02when it is desired to lift the pulley belt off the car wheel, so thatthe pump can be driven by a small internal combustion engine or anelectric motor or the like. To permit the lifting of the bracket |00,the bracket can be provided with a sector gear wheel |04, and this gearwheel can be actuated through the use of a swinging lever |05 havingformed thereon a sector gear |08 for meshing with the sector gear |04.

Where the pump is driven at different speeds, due to the change of speedof travel of the freight car, I can provide means for controlling theflow of the air circulating through the car. As illustrated in Figuresl0, 11, and 12, the spaces |01 above the partition |08 on each side oftheair circulating fan |09 can be opened or closed by sliding gates ||0.'Ihe gates ||0 can be automatically actuated according to the rate ofnow of the oil from the turbine to the return tank or sump H2.

To bring this about, I slidably mount in the Sump a bucket ||3 forinitially receiving the oil from the turbine. This bucket has formedtherein a relatively small oil escape opening I|4. The bucket issuspended in the `tank by means of exible ropes H0, which are trainedabout guide wheels ||0 secured to a shaft ||1. This shaft ||1 extendstransversely across the car above the partition |08 and the slidinggates III. Each sliding gate has connected therewith a ilexible rope H8,which is trained over and secured to a guide pulley ||9 secured to theshaft ||1.

In operation of this form of my invention, should the speed of the pumpincrease, a greater quantity of oil will be forced to the turbine, andthis oil will be delivered in relatively large quantities to the bucketH3. If the oil cannot escape fast enough through the opening ||4, theoil will collect in the bucket, and the weight thereof will carry thebucket down and turn the shaft H1. As the flexible ropes ||8 for thegates are wound in a reverse direction over the pulleys ||l from theropes I I 5 over` the pulleys I I6, the ropes I8 will be wound up on thepulleys of the guide wheels 9, and the gates will be raised. This willdecrease the circulation of air through the car.` The bucket ||3 alsoacts as a baille and facilitates the separation of air from the oil.

In some instances, it may be advisable to utilize a plurality of aircirculating fans, and in Figure 13, I have shown an air circulating fan|20 for each space |2| above the partition |22. In all events, thenumber of air circulating fans |20 can be increased or decreased withoutdeparting from the spirit or the scope of the invention. Thus, in theform of my invention shown in Figure 2, I have illustrated three fans,and in Figure 13, I have shown flve fans. As illustrated in Figure 14,two fans |23 can be utilized, and, if desired, these fans can bearranged on opposite sides of the longitudinal center of the car. In allinstances, the fans are shrouded or mounted in a suitable hood.

In certain instances, it may be desirable to eliminate the bunkers andto utilize the entire length of the cars for receiving the goods beingshipped, and in Figures 15 and 16, I have illustrated shiftablepartitions |24. Where shiftable partitions are utilized, the lower endsof the oil return Y,tanks or sumps |25 are connected by ilexible hoses|26 with the return oil pipe |21 for the oil pump, and it is also to beunderstood that a flexible hose is utilized from the oil feed pipe tothe turbines.

The partitions are held securely in place in an adjusted positionthrough the use of brackets |28 and screws |29. Obviously, by releasingthe screws, the partitions can be shifted back against the end walls ofthe freight car, as shown in dotted lines in Figure l5. The gratings |30for the ice can be arranged in the same plane as the false flooring |3|for the freight car, s0 as to facilitate the easy shifting of thepartition. The gratings |30 can be longitudinally slotted, as at |32, toform guideways for the flexible hoses |20 during the shifting of thepartition. The shifting of the partition will not affect the workingparts of my system in view of the fact that the turbines, fans, and oilsumps are all carried by the partitions. Where stationary partitions areutilized, I prefer to employ rigid pipes in the car, as shown in Figures1 and 2.

In lieu of utilizing the bypass hoses 02, shown in Figure 1 and 3, I canutilize a bypass pipe |33. 'I'his pipe |33 is connected with the feedoil pipe |34 extending to a turbine, and the by- ,siaaes 5 passpipecaabe extended directly into melon sump |25. A bypass valve |35 isemployed for the bypass pipe |33, and when the pressure of the oilreaches a certain degree, the valve will allow the escape of oil Afromthe pipe line |35 into the sump Ill.-

In lieu of providing a turbine'for each air circulating fan, I canutilize one turbine |36 only (see Figure 16) and drive the other fans|31 from this turbine through any suitable mechanical powertransmission, such as belts |38 and pulleys |19, or shafts and gearing.

From the foregoing description it can be seen that I have provided novelmeans for supporting the oil sumps in the partitions and novel means foroperating the oil pumps from a moving part of the freight car.

' ment separate from the storage compartment, an

air circulating fan for drawing air from one of said compartments anddelivering it to the other of said comaprtments, means for operatingsaid fan, including a turbine, and a pump delivering liquid underpressure to said turbine; means for driving the pump from a wheel of thetruck of the car, including a pulley belt normally held in engagementwith the periphery of said wheel.

2. In a refrigerator car of the type having a body including a storagecompartment and a bunker compartment therein, car trucks for the' bodyincluding car wheels, an air circulating fan for drawing air from one ofsaid compartments and delivering it to the other of said compartments,means for operating said fan, including a "turbine, and a pumpdelivering liquid under pressure to said turbine; a drive shaft for thepump, a pulley wheel on the drive shaft arranged on one side of the carwheel, an idle pulley wheel arranged on the other side of the car wheel,a

` pulley belttralned about said pulley wheelsfor engaging the peripheryof the car wheel, and means normally urging the belt into drivingcontact with said car wheel.

3. In a refrigerator car of the type having a body including a storagecompartment and a b'ux'iker compartment therein, car trucks for the bodyincluding car wheels, an air circulating fan for drawing air from one ofsaid compartments 'and delivering it to the other of said compartments,means for operating said fan, including a turbine, and a pump deliveringliquid under pressure to said turbine; a drive shaft for the pump, apulley wheel on the drive shaft arranged on one side ofthe car wheel, anidle pulley wheel arranged on the other side of the car Wheel, a pulleybelt trained about said pulley wheels for engaging the periphery of thecar Wheel, vmeans normally urging the belt into driving contact withsaid car wheel, and means for lifting the belt out of driving contactwith the car wheel, whereby to permit the operation of the pump from anexternal source of power. A

4. In a refrigerator car of the type having a body including a storagecompartment and a l bunker compartment therein, a car truck for the bodyhaving wheels, an air circulating fan for drawing air from one of saidcompartments and delivering it to the other of said compartments,

and means for operating said fan, including a turbine, a pump deliveringliquid under pressure to the turbine, a drive shaft for the pump. meansslidably mounting the pump and drive shaft on the body on one side of acar wheel, a cone pulley secured to the drive shaft, an idle pulleydisposed on the other side of the car wheel from the pump, a pulley belttrained about the idle pulley wheel and the cone pulley wheel, springmeans normally holding the pulley belt in driving contact with thelast-mentioned car wheel, and means for s hifting the pump and conepulley wheel relative to the belt in accordance with the pressure of theliquid delivered from the pump to the turbine.

5. In a refrigerator car of the type having a storage compartment and abunker compartment separate from the storage compartment, an aircirculating fan for drawing air from one of said compartments anddelivering it to the other of said compartments, means for operatingsaid fan, including a turbine, and a pump delivering liquid underpressure to said turbine: a drive shaft for the pump, a drive conepulley for the shaft, a pulley belt trained over the cone pulley, meansfor operating the belt from a wheel of the truck of the car, and meansfor shifting the cone pulley relative to the belt according to thepressure of the liquid delivered from the pump to the turbine.

6. In a refrigerator car of the type having a storage compartment and abunker therein, an air circulating fan for drawing air from one of saidcompartments and `delivering it to the other of said compartments, andmeans for operating said fan, including a turbine; a rotary pumpdelivering liquid under pressure to said turbine,

a return sump `for the liquid arranged in the car for receiving theliquid directly from the turbine, a return pipe for conducting spentliquid from the sump to the inlet of the pump, and

means for driving the pump from a wheel of the truck of the car.

'7. In a refrigerator car of the type having a transverse partition todivide the car into a storage compartment and a bunker compartment, anair circulating fan for drawing air from one of said compartments anddelivering it to the other of said compartments, and means for operatingsaid fan, including a turbine; a pump delivering liquid under pressureto said turbine, means for driving the pump from a moving part of thecar, a sump for the liquid arranged within said partition between theturbine and the pump, and a return pipe for conducting spent liquid fromthe bottom of the sump to the inlet of the pump.

8. In a refrigerator car of the type having a body and a transversepartition therein for dividing the body into a storage compartment and abunker compartment, an air circulating fan arranged above the partitionfor drawing air from one of said compartments and delivering it to theother of said compartments, and means for operating said fan, includinga turbine arranged above vthe partition; a pump for delivering liquidunder pressure to said turbine, a return sump for the liquid arranged insaid partition above the pump and directly below the turbine forreceiving spent liquid from said turbine,'and a return pipe forconducting liquid from the bottom of said sump to the inlet of the pump.y

9. In a refrigerator car ofthe type having a body and a transversepartition therein for dividing the body into a storage compartment and abunker compartment, an air circulating fan arranged above the partitionfor drawing air from one of said compartments and delivering it to theother of said compartments, and means for operating said fan, includinga turbine arranged above the partition; a pump for delivering liquidunder pressure to said turbine, a return sump for the liquid arranged insaid partition above the pump and directly below the turbine forreceiving spent liquid from said turbine, and a return pipe forconducting liquid from the bottom of said sump to the inlet of the pump,said partition being shiftable in said body to one position for formingthe compartments and to daynother position against an end wall of the bo10. In a refrigerator car of the type having a storage compartment and abunker compartment, an air circulating fan for drawing air from one ofsaid compartments and delivering it to the other of said compartments,means for operating said fan, including a turbine, and a pump deliveringliquid under pressure -to said turbine; means for driving the pump froma wheel of the truck of the car, including a swinging platform rockablymounted on the car, said pump being mounted directly on the platform, afriction pulley for engaging the wheel rotatably oarried by theplatform, means operatively connecting the pulley to the pump, springmeans normally urging the platform and the friction ,pulley toward thewheel, and means for holding the platform in a raised position with thefriction pulley out of engagement with the car wheel.

11. In a refrigerator car of the type having a body including a storagecompartment and a lbunker compartment, an air circulating fan fordrawing air from one of said compartments and delivering it to the otherof said compartments, means for operating said fan, including a turbine,and a pump delivering liquid under pressure to said turbine; means fordriving the pump from a wheel of the truck of the car, including aswinging platform rockably carried by the car, means securing the pumpto the body of the car above the platform, a friction pulley carried bythe platform, means normally urging the platform and friction pulleytoward the wheel with the pulley in driving contact with the wheel, anda flexible shaft operatively connecting the friction pulley with thepump.

12. In a refrigerator car of the type having a body including a storagecompartment and a bunker compartment, an air circulating fan for drawingair from one of said compartments and delivering it to the other of saidcompartments, means for operating said fan, including a turbine, and apump delivering liquid under pressure to said turbine; means for drivingthe pump from a wheel of the truck of the car, including a swingingplatform rockably carried by the car, means securing the pump to thebody of the car above the platform, a friction pulley carried by theplatform, means normally urging the platform and friction pulley towardthe wheel with the pulley in driving contact with the wheel, a iieidbleshaft operatively connecting the friction pulley with the pump, and aflexible coupling interposed between the flexible shaft and the pump.

ing it to the other of said compartments, means for operating said fan,including a turbine, a pump delivering liquid under pressure to saidturbine, means for driving the pump from a moving part of the car, andgates for controlling the space between the partition and the top of thecar; means for automatically operating said gates according to the rateof flow of spent liquid from said turbine. A

14. In a refrigerator car of the type having a body and a transversepartitionarranged in said body terminating short of the top of the bodyforming a storage compartment and a bunker compartment, an aircirculating fan for drawing air from one or said compartments anddelivering it to the other of said compartments, means for operatingsaid fan, including a turbine, a pump delivering liquid under pressureto said turbine, means for driving the pump from a moving part of thecar, and gates for controlling the space between the partition and thetop of the car; means for automatically operating said gates accordingto the rate of flow of liquid delivered to said turbine, Said meansincluding a movable bucket for receiving liquid from the turbine, ashaft for moving the gates, and an operative connection between themovable bucket and the shaft.

15. In a refrigerator car of the type having a body including atransverse partition therein terminating short of the upper end of thebody forming a storage compartment and a bunker compartment in saidbody, an air circulating fan for drawing air from one compartment anddelivering it to the other compartment, a turbine for operating saidfan. a pump for delivering liquid under pressure to said turbine, areturn sump for the liquid arranged below the fan and turbine, a returnpipe for conducting spent liquid from the bottom of the sump to theinlet of the pump, and movable gates for controlling the active size ofthe space between the partition and the top of the body: a rotatableshaft disposed above the gates, means operatively connecting the shaftto the gates, a sliding bucket arranged in the sump for initiallyreceiving the liquid from the turbine, said bucket having a small drainopening therein, and means operatively connecting the sliding bucket tothe shaft for operating said shaft upon downward movement of the bucket.

16. In a refrigerator car having a body provided with a transversepartition dividing the body into a storage compartment and a bunkercompartment, sai partition including equidistantly spaced rights andpanels between said uprights terminationg short of the top of the cardefining a plurality of openings between the panels and the top of thecar, and air circulating fans arranged in certain of said openings onop-` posite sides of the central opening.

17. In a refrigerator car of the type having a body including a storagecompartment and a bunker compartment therein, an air circulating fan fordrawing air from one of said compartments and delivering it to the otherof said compartments, means for operating said fan. including a turbine,and a pump delivering liquid under pressure to the turbine: means fordriving the pump from a wheel of the truck of the car, and means forminga part of said drive for maintaining the speed of the pump substantiallyuniform, irrespective of the speed of rotation of the car wheel.

18. In a refrigerator car of the type having a storage compartment and abunker therein, an air circulating fan for drawing air from one of saidcompartments and delivering it to the other of said compartments, meansfor operating said fan, including a turbine, and a pump for deliveringliquid under pressure to said turbine; a. return sump for the liquidarranged in the car for receiving the liquid directly from the turbine,a

ROBERT KENT SCHW'EBS.

